Biwako Onsen

Biwako, Shiga, Kansai, Japan

Location: Biwako, Shiga, Kansai, Japan
Water type: bicarbonate
Temperature: 40 °C
pH: 8

Water profile

Thermicity

Sedative

40 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Restorative

LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Biwako Onsen is located in Otsu, Shiga Prefecture, on the shores of Lake Biwa, Japan's largest freshwater lake and an ancient body of water that has shaped the cultural and economic life of the Kinki region for millennia. The siliceous thermal waters here offer bathers stunning views across the vast expanse of Lake Biwa, especially enchanting at sunrise and during seasonal mists. This lakeside onsen destination combines the restorative benefits of mineral spring bathing with panoramic views of one of Japan's most iconic natural landscapes.

Insider tip — Biwako Onsen occupies the western shore of Japan's largest freshwater lake, with thermal facilities that often orient their baths to capture panoramic views across Lake Biwa toward the Hira mountain range. Bicarbonate spring water at 40°C is especially popular during the winter months when the lake surface mists under cold air. The nearby Hikone Castle and Enryakuji temple complex on Mount Hiei provide full-day cultural itineraries to frame around the spa. Sunset baths in October are particularly spectacular.

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